Desprairies, Alain; Rivière, Marc; Pubellier, Manuela (1991): Geochemistry of Neogene volcanic ashs in ODP Leg 124 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.762390, Supplement to: Desprairies, A et al. (1991): Diagenetic evolution of Neogene volcanic ashes (Celebes and Sulu Seas). In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 489-503, https://doi.org/10.2973/odp.proc.sr.124.178.1991
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Mineralogical and geochemical analyses were performed on 40 ash layers of Pleistocene to late Miocene age, recovered during Leg 124 in the Celebes and Sulu Seas (Sites 767, 768, and 769). They provide information on alteration processes related to burial diagenesis. The zonal distribution of secondary volcanic products emphasizes a major diagenetic change, characterized by the complete replacement of volcanic glass by an authigenic smectite-phillipsite assemblage, in tephra layers dated at 3.5-4 Ma. This diagenetic "event" occurs simultaneously in the two basins, and, on the basis of isotopic data, under low-temperature conditions. It is independent of distinct sedimentation rates and related to a relative quiescence of on-land volcanic activity. This period suggests a more uniform paleooceanographic situation having tectonic significance, and probably reflects a kinetic and environmental control of diagenetic reactions.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 6.272800 * Median Longitude: 122.548309 * South-bound Latitude: 4.791500 * West-bound Longitude: 121.219300 * North-bound Latitude: 8.785400 * East-bound Longitude: 123.503300
Date/Time Start: 1988-11-10T15:00:00 * Date/Time End: 1988-12-18T00:00:00
Event(s):
124-767B * Latitude: 4.791500 * Longitude: 123.503300 * Date/Time Start: 1988-11-10T15:00:00 * Date/Time End: 1988-11-19T20:15:00 * Elevation: -4916.0 m * Penetration: 739 m * Recovery: 585.05 m * Location: Mindanao Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 739 m cored; 0 m drilled; 79.2 % recovery
124-768A * Latitude: 8.000000 * Longitude: 121.219300 * Date/Time Start: 1988-11-27T16:15:00 * Date/Time End: 1988-11-28T10:45:00 * Elevation: -4396.0 m * Penetration: 9.5 m * Recovery: 8.8 m * Location: Sulu Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 9.5 m cored; 0 m drilled; 92.6 % recovery
124-768B * Latitude: 8.000000 * Longitude: 121.219800 * Date/Time Start: 1988-11-28T10:45:00 * Date/Time End: 1988-11-28T21:30:00 * Elevation: -4396.0 m * Penetration: 364.1 m * Recovery: 293.79 m * Location: Sulu Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 40 cores; 364.1 m cored; 0 m drilled; 80.7 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets
Download Data
Datasets listed in this publication series
- Desprairies, A; Rivière, M; Pubellier, M (1991): (Table 4) Chemical analyses and structural formulas for smectite from altered ash layers of ODP Hole 124-767B. https://doi.org/10.1594/PANGAEA.762388
- Desprairies, A; Rivière, M; Pubellier, M (1991): (Table 1) Location and age of ash-layer samples in ODP Leg 124 holes. https://doi.org/10.1594/PANGAEA.762385
- Desprairies, A; Rivière, M; Pubellier, M (1991): (Table 5) Stable oxygen isotope ratios of glass, clay minerals, and zeolite of ODP Leg 124 holes. https://doi.org/10.1594/PANGAEA.762389
- Desprairies, A; Rivière, M; Pubellier, M (1991): (Table 2) Location and age of diagenetic zones in ODP Leg 124 holes. https://doi.org/10.1594/PANGAEA.762386
- Desprairies, A; Rivière, M; Pubellier, M (1991): (Table 3) Major-element analyses of fresh and altered glass, phillipsite, and K-feldspar of ODP Leg 124 holes. https://doi.org/10.1594/PANGAEA.762387